下面是我原来问题的具体答案，但是如果你想要达到一般类似的结构，那么按照下面的camickr方法可能会更实用。要按我原来想要的方式执行此操作，您必须覆盖JPanel并为外部容器实现Scrollable。 （归功于用户Kylar - JTextArea on JPanel inside JScrollPane does not resize properly）
import javax.swing.*;
import java.awt.*;
import javax.swing.text.*;
public class MyEditor extends JTextPane {
JFrame window;
JScrollPane editScroll;
NumberLines numPane;
HoldMe please;
public static void main(String args[]) {
new MyEditor();
}
MyEditor() {
setOpaque(false);
setEditorKit(new TextWrapKit());
numPane = new NumberLines();
numPane.setPreferredSize(new Dimension(50,100));
please = new HoldMe();
please.setLayout(new BorderLayout());
please.add(this,BorderLayout.CENTER);
please.add(numPane,BorderLayout.WEST);
editScroll = new JScrollPane(please);
editScroll.setPreferredSize(new Dimension(500,500));
editScroll.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
editScroll.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
window = new JFrame();
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.getContentPane().add(editScroll);
window.pack();
window.setVisible(true);
}
private class HoldMe extends JPanel implements Scrollable{
public Dimension getPreferredScrollableViewportSize() {
return super.getPreferredSize(); //tell the JScrollPane that we want to be our 'preferredSize' - but later, we'll say that vertically, it should scroll.
}
public int getScrollableUnitIncrement(Rectangle visibleRect, int orientation, int direction) {
return 16;//set to 16 because that's what you had in your code.
}
public int getScrollableBlockIncrement(Rectangle visibleRect, int orientation, int direction) {
return 16;//set to 16 because that's what you had set in your code.
}
public boolean getScrollableTracksViewportWidth() {
return true;//track the width, and re-size as needed.
}
public boolean getScrollableTracksViewportHeight() {
return false; //we don't want to track the height, because we want to scroll vertically.
}
}
private class NumberLines extends JPanel {
NumberLines() {
setBackground(new Color(120,120,120));
setOpaque(false);
repaint();
}
@Override
protected void paintComponent(Graphics g) {
g.fillRect(0,0,this.getWidth(),this.getHeight());
}
}
private class TextWrapKit extends StyledEditorKit {
ViewFactory defaultFactory=new TextWrapFactory();
public ViewFactory getViewFactory() {
return defaultFactory;
}
}
private class TextWrapFactory implements ViewFactory {
public View create(Element elem) {
String kind = elem.getName();
if (kind != null) {
if (kind.equals(AbstractDocument.ContentElementName)) {
return new TextWrapView(elem);
} else if (kind.equals(AbstractDocument.ParagraphElementName)) {
return new ParagraphView(elem);
} else if (kind.equals(AbstractDocument.SectionElementName)) {
return new BoxView(elem, View.Y_AXIS);
} else if (kind.equals(StyleConstants.ComponentElementName)) {
return new ComponentView(elem);
} else if (kind.equals(StyleConstants.IconElementName)) {
return new IconView(elem);
}
}
// default to text display
return new LabelView(elem);
}
}
private class TextWrapView extends LabelView {
public TextWrapView(Element elem) {
super(elem);
}
public float getMinimumSpan(int axis) {
switch (axis) {
case View.X_AXIS:
return 0;
case View.Y_AXIS:
return super.getMinimumSpan(axis);
default:
throw new IllegalArgumentException("Invalid axis: " + axis);
}
}
}
}
编辑：代码替换为SCCE，对不起麻烦
好的，所以它的结构是这样......
•顶级 - 扩展JTextPane
•将此JTextPane放入设置为BorderLayout CENTER的JPanel
•将另一个JPanel放入设置为WEST
的同一JPanel中•将持有两者的JPanel放入JScrollPane
•准备部署（禁止）
基本上，我无法找到一种方法来做到这一点，而不会失去一些关键的东西。我可以把它们放在一起，但我会丢失滚动。或者我会向后滚动，但随后会丢失文本包装。有一次我得到了包装，从技术上说它滚动但不是应该有的，换句话说，滚动窗格没有检测到文本的大小。我需要嵌套的JPanel（第一个）来滚动JTextPane
问题区域在下面的构造函数中，对不起它是如此混乱，但我在这里尝试不同的东西失去它...可能没有帮助。如果有人能帮助我解决这个问题，我将非常感激。
感谢您的阅读。
import javax.swing.*;
import java.awt.*;
import javax.swing.text.*;
import java.awt.BorderLayout;
public class MyEditor extends JTextPane {
JFrame window;
JScrollPane editScroll;
public static void main(String args[]) {
new MyEditor();
}
MyEditor() {
setOpaque(false);
setEditorKit(new TextWrapKit());
JPanel numPane = new JPanel();
JPanel packEdit = new JPanel();
packEdit.setLayout(new BorderLayout());
packEdit.add(this,BorderLayout.CENTER);
packEdit.add(numPane,BorderLayout.WEST);
editScroll = new JScrollPane(packEdit);
editScroll.setPreferredSize(new Dimension(500,500));
editScroll.setViewportView(packEdit);
editScroll.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
editScroll.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_NEVER);
window = new JFrame();
window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
window.add(editScroll);
window.pack();
window.setVisible(true);
}
private class TextWrapKit extends StyledEditorKit {
ViewFactory defaultFactory=new TextWrapFactory();
public ViewFactory getViewFactory() {
return defaultFactory;
}
}
private class TextWrapFactory implements ViewFactory {
public View create(Element elem) {
String kind = elem.getName();
if (kind != null) {
if (kind.equals(AbstractDocument.ContentElementName)) {
return new TextWrapView(elem);
} else if (kind.equals(AbstractDocument.ParagraphElementName)) {
return new ParagraphView(elem);
} else if (kind.equals(AbstractDocument.SectionElementName)) {
return new BoxView(elem, View.Y_AXIS);
} else if (kind.equals(StyleConstants.ComponentElementName)) {
return new ComponentView(elem);
} else if (kind.equals(StyleConstants.IconElementName)) {
return new IconView(elem);
}
}
// default to text display
return new LabelView(elem);
}
}
private class TextWrapView extends LabelView {
public TextWrapView(Element elem) {
super(elem);
}
public float getMinimumSpan(int axis) {
switch (axis) {
case View.X_AXIS:
return 0;
case View.Y_AXIS:
return super.getMinimumSpan(axis);
default:
throw new IllegalArgumentException("Invalid axis: " + axis);
}
}
}
}
答案 0 :(得分：1)
扩展了JTextPane
为什么？
setEditorKit（new TextWrapKit（））;
为什么呢？
使滚动窗格使用默认组件。然后，如果由于某种原因您仍需要自定义，您可以一次更改一个，以确保它仍然有效。如果它不再起作用，那么你就知道问题所在。
packEdit.add（numPane，BorderLayout.WEST）;
在我看来，您正在尝试添加行号。执行此操作的标准方法是将组件添加到滚动窗格的行标题，而不是将其添加到视口中的面板的一部分。有关此方法的示例，请参阅Text Component Line Number。
将来，每个问题都应张贴SSCCE。如果没有SSCCE，您将获得一个免费（尝试）答案。